/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.transformation.dag.column.ternary;

import org.apache.iotdb.db.mpp.transformation.dag.column.ColumnTransformer;
import org.apache.iotdb.tsfile.read.common.block.column.Column;
import org.apache.iotdb.tsfile.read.common.block.column.ColumnBuilder;
import org.apache.iotdb.tsfile.read.common.type.Type;
import org.apache.iotdb.tsfile.read.common.type.TypeEnum;

public abstract class CompareTernaryColumnTransformer extends TernaryColumnTransformer {
    public CompareTernaryColumnTransformer(
            Type returnType,
            ColumnTransformer firstColumnTransformer,
            ColumnTransformer secondColumnTransformer,
            ColumnTransformer thirdColumnTransformer) {
        super(returnType, firstColumnTransformer, secondColumnTransformer, thirdColumnTransformer);
    }

    @Override
    public void evaluate() {
        firstColumnTransformer.tryEvaluate();
        secondColumnTransformer.tryEvaluate();
        thirdColumnTransformer.tryEvaluate();
        // attention: get positionCount before calling getColumn
        int positionCount = firstColumnTransformer.getColumnCachePositionCount();
        Column firstColumn = firstColumnTransformer.getColumn();
        Column secondColumn = secondColumnTransformer.getColumn();
        Column thirdColumn = thirdColumnTransformer.getColumn();
        ColumnBuilder columnBuilder = returnType.createColumnBuilder(positionCount);
        doTransform(firstColumn, secondColumn, thirdColumn, columnBuilder, positionCount);
        initializeColumnCache(columnBuilder.build());
    }

    @Override
    protected final void checkType() {
        if (firstColumnTransformer.isReturnTypeNumeric()
                && secondColumnTransformer.isReturnTypeNumeric()
                && thirdColumnTransformer.isReturnTypeNumeric()
                || firstColumnTransformer.typeEquals(TypeEnum.BINARY)
                && secondColumnTransformer.typeEquals(TypeEnum.BINARY)
                && thirdColumnTransformer.typeEquals(TypeEnum.BINARY)) {
            return;
        }

        throw new UnsupportedOperationException(
                String.format("The Type of three subExpression should be all Numeric or Text"));
    }

    protected abstract void doTransform(
            Column firstColumn,
            Column secondColumn,
            Column thirdColumn,
            ColumnBuilder builder,
            int positionCount);
}
